Does anyone know a way of the deleting a trojan horse manually that when trying to delete it it doesnt tell you that is being used by another person or computer. I have tried to delete it with other anti trojan programs but they are not able to open it.(Anti Trojan Elite). I need help, also the file that I found which I think is the trojan changes its size repeatedly, for example form 7Kb to 52Kb and vice versa Jorge Fernandez

Can this be a trojan? Jorge Fernandez

Jorge, most AV programs can handle a trojan and surely an anti-trojan can do the job. If it were me, I think I would try 1 more anti-trojan like A². You can get it at : http://www.emsisoft.com/en/software/download If that doesn't do the job, it's possible your trojan is in restore. Be aware that ME and XP both have a feature called 'Restore'. A nasty (virus, spyware, etc) can hide there and since it is a 'Windows' file, Windows won't allow any alteration so long as it is active. The registry gets re-written on the next bootup and the last successful boot is used and since nasties don't count, the boot appears to be sucessful, thus a 'nasty' gets replicated. The solution is simple (assuming that's the problem), TEMPORARILY disable Restore (in order to 'unprotect'), scan/clean, re-enable restore and try again. May have to reboot for it to take effect. During the disable process, you will destroy ALL your restore points, thus some folks disagree with that fix, feeling that any restore point (even a corrupted one!) is better than none at all You can sidestep that pitfall by creating a new restore point as soon as you have a clean machine. FWIW,I have used it on both ME & XP Pro with no lasting ill effects. HTH. Ed in Texas.

You might also want to try these online scanning services: TrojanScan Anti-Trojan.org

Jorge. How do you know it is a trojan. Trendmicro should have found it and deleted it if you went there and did as i suggested. I have yet to hear of any trojan that was not fixed by them. What is the name of that file? and exactly what is it suppose to be doing to make you think it is a trojan, besides changing sizes. A lot of files will change sizes while being accessed because they transfer info to prefetch and dat files and also also to backup files on a regular basis. So again what is the name of the file. IN THE MATTERS OF STYLE, swim with the current; in matters of principle, STAND LIKE A ROCK